* {
    margin: 0;
    padding: 0;
}

ul,
li {
    list-style: none;
}

#side-bar {
    position: fixed;
    z-index: 99;
    right: 0;
    bottom: 50px;
    li {
        width: 60px;
        height: 60px;
        line-height: 60px;
        background-color: #fff;
        cursor: pointer;
        text-align: center;
        color: black;
        a {
            display: inline-block;
            width: 60px;
            height: 60px;
            color: black;
            text-align: center;
            position: absolute;
            top: 0px;
            right: -25px;
        }
    }
    li:hover {
        background-color: rgba(168, 161, 161, 0.253);
        color: red;
    }
    .active {
        background: yellow;
    }
}